A few years ago if you said anything negative about Rails, you were either pure evil or unbearably stupid; or both.

If you didn't fully embrace tableless design with CSS, despite the latter's glaring defeciencies for that task, it was the same treatment.

I also recall great pressure to adopt EJB with its deeply flawed architecture, etc.

I could go on, but the point is that there seems to come a time when all of these things face a moment of truth, wherein sober minds feel a little freer to speak aloud on their shortcomings. This frequently snowballs into all out backlash against the tech in favor of The Latest Shiny Thing.

The enforcers of what's hip and smart for everyone now move on to browbeating Developer Land with the new tech, and we all allow it to happen again. Why do we keep repeating this process when we've all seen the movie so many times?